National Phone Number Registry NPNR

Area Code 240 Location

Area code 240 is currently assigned for use in Maryland since Jun 01, 1997. This area code originated from the 301 area code previously by means of area code split or overlay. View all phone prefixes used in area code 240 or other area codes in Maryland.

(240)
Enter 7-digit phone number for area code 240 or the complete 10-digit phone number

Phone Prefixes for Area Code 240

Page 1 of 13 — Previous   Next
Area code Location Company / Service Provider
240-200 Washington, MD BANDWIDTH.COM CLEC, LLC - MD
240-201 RIDGE, MD PEERLESS NETWORK OF MARYLAND, LLC
240-203 HAGERSTOWN, MD SPRINT SPECTRUM L.P. - MD
240-204 Washington, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-205 Washington, MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-206 Washington, MD XO MARYLAND, LLC
240-207 Damascus, MD CAVALIER EAST LLC - MD
240-208 LA PLATA, MD PEERLESS NETWORK OF MARYLAND, LLC
240-209 Indian Head, MD PEERLESS NETWORK OF MARYLAND, LLC
240-210 WALDORF, MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-212 OAKLAND, MD CORE COMMUNICATIONS, INC. - MD
240-213 WALDORF, MD PEERLESS NETWORK OF MARYLAND, LLC
240-214 Mechanicsville, MD PEERLESS NETWORK OF MARYLAND, LLC
240-215 FREDERICK, MD TELCOVE OPERATIONS, INC. - MD
240-216 WALDORF, MD SPRINT SPECTRUM L.P.
240-217 HAGERSTOWN, MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-218 NANJEMOY, MD PEERLESS NETWORK OF MARYLAND, LLC
240-219 RIDGE, MD PEERLESS NETWORK OF MARYLAND, LLC
240-220 Poolesville, MD PEERLESS NETWORK OF MARYLAND, LLC
240-221 Washington County, MD VERIZON MARYLAND, INC.
240-222 WALDORF, MD CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD
240-223 Washington, MD ALLEGIANCE TELECOM, INC. - MD
240-224 Gaithersburg, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-225 FREDERICK, MD CORE COMMUNICATIONS, INC. - MD
240-228 WSNG236Z13, MD VERIZON MARYLAND, INC.
240-229 WALDORF, MD BROADWING COMMUNICATIONS. LLC - MD
240-230 Hughesville, MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-231 HAGERSTOWN, MD CORE COMMUNICATIONS, INC. - MD
240-232 Washington, MD BROADWING COMMUNICATIONS. LLC - MD
240-233 Tompkinsville, MD TELEPORT COMMUNICATIONS AMERICA, LLC - DC
240-234 Washington, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-235 Washington, MD PAETEC COMMUNICATIONS, INC. - MD
240-236 FREDERICK, MD VERIZON MARYLAND, INC.
240-237 Lexington Park, MD TELEPORT COMMUNICATIONS AMERICA, LLC - DC
240-238 Washington, MD PAETEC COMMUNICATIONS, INC. - MD
240-239 Leonardtown, MD CORE COMMUNICATIONS, INC. - MD
240-241 WSNG236Z13, MD STARPOWER COMMUNICATIONS, LLC - MD
240-242 Washington County, MD STARPOWER COMMUNICATIONS, LLC - MD
240-243 Gaithersburg, MD ALLEGIANCE TELECOM, INC. - MD
240-244 Washington, MD STARPOWER COMMUNICATIONS, LLC - MD
240-245 Washington, MD STARPOWER COMMUNICATIONS, LLC - MD
240-246 Gaithersburg, MD STARPOWER COMMUNICATIONS, LLC - MD
240-247 Washington, MD ALLEGIANCE TELECOM, INC. - MD
240-248 RIDGE, MD PEERLESS NETWORK OF MARYLAND, LLC
240-249 Mechanicsville, MD TELEPORT COMMUNICATIONS AMERICA, LLC - DC
240-250 BRANDYWINE, MD PEERLESS NETWORK OF MARYLAND, LLC
240-251 HIGHFIELD, MD CORE COMMUNICATIONS, INC. - MD
240-252 Gaithersburg, MD LEVEL 3 COMMUNICATIONS, LLC - MD
240-253 Washington, MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-254 Hughesville, MD TELEPORT COMMUNICATIONS AMERICA, LLC - DC
New numbers being added to 240 area code
Effective: 04/21/2017
240-531 in WASHINGTON, MD
TELNYX LLC
Effective: 05/11/2017
240-557 in WASHINGTON, MD
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240 Area Code Information
Type of code: General Purpose Code
Location: MD - US
Time zone: E
Assigned for use: Yes
Code in service: Yes
Service date: June 01, 1997
In jeopardy: No
Relief in progress: No
NPA Relief status:
Code assignable: Yes
Geographic or
non-geographic:
G
Reserved for future use: No
Planning letter(s): IL96/07-004 IL96/06-009
Overlay code: Yes
Overlay complex: 227/240/301
Dialing plan Standard Permissive
Home local calls: 10D 1+10D
Foreign local calls: 10D 1+10D
Home toll calls: 1+10D NA
Foreign toll calls: 1+10D -

Home   ·   Area Codes   ·   News & Info
Some useful links:
National Do Not Call Registry FTC - Cell Phones and the Do Not Call Registry FCC - Do Not Call List FTC Complaint Assistant 1.3.85